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Suzuki's 3-cyl. motorcycle engines were all 2 strokes...the Metro's is a 4 stroke. they do not burn oil (at least, not on purpose), & they have a camshaft & valves...the 2 strokes do not have these. As for Harley 2-strokes, they don't make them, except for a few Italian-made dirt bikes a few years back.
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